| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 2 |
2.8%
|
| 2 | Land border crossing | 3 |
4.2%
|
| 3 | Seaport | 67 |
93.1%
|
| Sysmiss | 926 |